Course
Flat out-and-back on the paved B&O rail trail, starting and finishing at Daredevil Brewing Co. in Speedway, Indiana. The route runs west through Marion and Hendricks County before turning back toward the start. 50k, 25k, 10k and 5k are offered; the 50k has an eight-hour limit.
50K50 km
Key dates
- ★Race dayOctober 2027 · date to be announced
Provisional date, projected from last year — the organiser has not announced this edition yet. We show the month only.
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Save The Big BO 50K to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Tecumseh Trail Challenge
Follows the historic Tecumseh Trail through Brown County
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